924

NTE924 & NTE924M
Integrated Circuit
Voltage Follower, Operational Amplifier
Description:
The NTE924 and NTE924M are monolithic operational amplifiers internally connected as unity–gain
non–inverting amplifiers. These devices use super–gain transistors in the input stage to get low bias
current without sacrificing speed. Directly interchangeable with the NTE909 and NTE941 series in
voltage follower applications, these devices have internal frequency compensation and provision for
offset balancing.
Features:
D Available in 8–Lead DIP (NTE924M) and 8–Lead Metal Can (NTE924) Packages
D Input Current: 10nA Max Over Temperature
D Small Signal Bandwidth: 20MHz
D Slew Rate: 30V/µs
D Supply Voltage Range: ±5V to ±18V
Absolute Maximum Ratings:
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18V
Power Dissipation (Note 2), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Input Voltage (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±15V
Output Short–Circuit Duration (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C
Note 1. The NTE924M is a discontinued device and no longer available.
Note 2. For operating at elevated temperatures, the NTE924 must be derated based on a thermal
resistance of +150°C/W, junction–to–ambient, or +45°C/W, junction–to–case. The thermal
resistance of the NTE924M is +100°C/W, junction–to–ambient.
Note 3. For supply voltages less than ±15V, the absolute maximum input voltage is equal to the supply
voltage.
Note 4. Continuous short–circuit is allowed for case temperatures to +70°C or +55°C ambient temperature. It is necessary to insert a resistor greater than 2kΩ in series with the input when
the amplifier is driven from low impedance sources to prevent damage when the output is
shorted. RS = 5k min, 14k typical is recommended for dynamic stability in all applications.
Electrical Characteristics: (±5V ≤ VS ≤ ±18V, 0° ≤ TA ≤ +70°C unless otherwise specified)
Parameter
Test Conditions
Input Offset Voltage
Min
Typ
Max
Unit
–
2.5
7.5
mV
–
–
10
mV
–
2.0
7.0
nA
–
–
10
nA
1010
1012
–
Ω
–
1.5
–
pF
TA = +25°C, VS = ±15V, VOUT = ±10V, RL = 8kΩ
0.999
0.9999
–
V/V
VS = ±15V, VOUT = ±10V, RL = 10kΩ
0.999
–
–
V/V
TA = +25°C
Input Bias Current
TA = +25°C
Input Resistance
TA = +25°C
Input Capacitance
Large Signal Voltage Gain
Output Resistance
TA = +25°C
–
0.75
2.5
Ω
Supply Current
TA = +25°C
–
3.9
5.5
mV
–
10
–
µV/°C
Temperature Drift
Output Voltage Swing
VS = ±15V, RL = 10kΩ, Note 5
±10
–
–
V
Supply Voltage Rejection Ratio
±5V ≤ VS ≤ ±18V
70
80
–
dB
Note 5. Increased output swing under load can be obtained by connecting an external resistor
between the booster and V (–) terminals.
Pin Connection Diagram
NTE924
(Top View)
NTE924M
Booster
5
Output
V (+)
6
4
3
7
Balance
V (–)
2
8
1
Balance
N.C.
Input
Balance
1
8
Balance
N.C.
2
7
V (+)
Input
3
6
Output
V (–)
4
5
Booster
NTE924
.370 (9.39) Dia Max
.355 (9.03) Dia Max
.177 (4.5)
Max
.492
(12.5)
Min
.018 (0.45) Dia Typ
3
2
4
1
45°
5
8
7
.200 (5.08)
Dia
6
.032 (0.82)
NTE924M
8
5
.256 (6.52) Max
1
4
.393 (10.0)
Max
.300
(7.62)
.150
(3.81)
.100 (2.54)
.070 (1.77) Min
.300 (7.62)
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